crackerjack

US /ˈkræk.ɚ.dʒæk/
UK /ˈkræk.ɚ.dʒæk/
1.

crackerjack

excellent, of the highest standard:

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He has a reputation as a crackerjack operations executive.
1.

crackerjack

something or someone excellent:

:
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a crackerjack of a novel